Hair brush



FIG. 1 is a perspective view of a hair brush, showing my new design;

FIG. 2 is a right side elevation view thereof, the left side elevation view being a mirror image thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevation view thereof; and,

FIG. 6 is a rear elevation view thereof.

The broken lines shown in the drawings depict portions of the hair brush that form no part of the claimed design. 

CLAIM The ornamental design for a hair brush, as shown and described. 